/**
/// <summary>
/// The main entry point for the application.
/// Can be used to test the programm and run it from command line.
/// </summary>
[STAThread]
static void Main(string[] args)
{
const string SEH = "--- screen ends here ---";
// coordinates are 0,0 based since we do not specify anything
VirtualScreen vs = new VirtualScreen(80, 40);
// simple fill
VirtualScreenTest.FillScreen(vs);
Console.WriteLine(vs.Hardcopy());
Console.WriteLine(SEH);
Console.ReadLine();
// deleting of an area
vs.CleanScreen(4,4,75,35);
Console.WriteLine(vs.Hardcopy());
Console.WriteLine(SEH);
Console.ReadLine();
// scrolling
vs.ScrollUp(2);
Console.WriteLine(vs.Hardcopy());
Console.WriteLine(SEH);
Console.ReadLine();
// block operations (write to screen)
VirtualScreenTest.WriteBlockOperation(vs);
Console.WriteLine(vs.Hardcopy());
Console.WriteLine(SEH);
Console.ReadLine();
// cursor movements
VirtualScreenTest.WriteBigX(vs);
Console.WriteLine(vs.Hardcopy());
Console.WriteLine(SEH);
Console.ReadLine();
} // main
**/
/// <summary>
/// Fill the screen with a pattern
/// </summary>
/// <param name="vs">Virtual screen</param>
public static void FillScreen(VirtualScreen vs)
{
byte w = 48; // 48=0 57=9
for (int y = 0; y < vs.Height; y++)
{
w = 48;
for (int x = 0; x < vs.Width; x++)
{
vs.WriteByte(w);
if (w<57)
w++;
else
w = 48;
}
}
}
/// <summary>
/// Connect to the telnet server
/// </summary>
/// <returns>true if connection was successful</returns>
public bool Connect()
{
// check for buffer
if (this.buffer==null)
this.buffer = new byte[RECEIVEBUFFERSIZE];
// virtual screen
if (this.virtualScreen==null)
this.virtualScreen = new VirtualScreen(this.vsWidth, this.vsHeight, 1, 1);
// set the callbacks
if (this.callBackReceive==null)
this.callBackReceive = new AsyncCallback(ReadFromStream);
if (this.callBackSend==null)
this.callBackSend = new AsyncCallback(WriteToStream);
// flags
this.serverEcho = false;
this.clientInitNaws = false;
this.firstResponse = true;
this.nawsNegotiated = false;
this.forceLogout = false;
// return physical connection
if (this.tcpClient!=null)
return true; // we still have a connection -> ?? better reconnect ??
else
{
try
{
// TODO: Improve performance ...?
// This is not working: IPAddress ipAddress = IPAddress.Parse(this.hostName);
// IPEndPoint ipEndPoint = new IPEndPoint(ipAddress, this.port);
// because it addresses local endpoints
this.tcpClient = new TcpClient(this.hostName, this.port);
this.tcpClient.ReceiveTimeout = this.timeoutReceive;
this.tcpClient.SendTimeout = this.timeoutSend;
this.tcpClient.NoDelay = true;
this.tcpClient.GetStream().BeginRead(this.buffer, 0, this.buffer.Length, this.callBackReceive, null);
return true;
}
catch
{
this.tcpClient = null;
return false;
}
}
}
/// <summary>
/// Closes external resources.
/// Safe, can be called multiple times
/// </summary>
public void Close()
{
// physical connection
if (this.tcpClient!=null)
{
try
{
if (this.tcpClient.GetStream() != null)
{
// it is important to close the stream
// because somehow tcpClient does not physically breaks down
// the connection - on "one connection" telnet server the
// server remains blocked if not doing it!
try
{
this.tcpClient.GetStream().Close();
}
catch
{
// further handling would go here
}
}
this.tcpClient.Close();
this.tcpClient = null;
}
catch
{
this.tcpClient = null;
}
}
// clean up
// fast, "can be done several" times
this.virtualScreen = null;
this.buffer = null;
this.callBackReceive = null;
this.callBackSend = null;
this.forceLogout = false;
}
/// <summary>
/// Connect to the ssh server
/// </summary>
/// <returns>true if connection was successful</returns>
public bool Connect()
{
// check for buffer
if (this.buffer == null)
{
this.buffer = new byte[RECEIVEBUFFERSIZE];
}
// virtual screen
if (_virtualScreen == null)
{
_virtualScreen = new VirtualScreen(this.vsWidth, this.vsHeight, 1, 1);
}
/*
* // set the callbacks
* if (this.callBackReceive == null)
* this.callBackReceive = new AsyncCallback(ReadFromStream);
* if (this.callBackSend == null)
* this.callBackSend = new AsyncCallback(WriteToStream);
*/
// flags
this.serverEcho = false;
this.clientInitNaws = false;
this.firstResponse = true;
this.nawsNegotiated = false;
this.forceLogout = false;
//Open SSH-Connection
Granados.SSHConnectionParameter f = new Granados.SSHConnectionParameter();
f.EventTracer = new Tracer(); //to receive detailed events, set ISSHEventTracer
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
f.Protocol = Granados.SSHProtocol.SSH2; //this sample works on both SSH1 and SSH2
string host_ip = hostName;
f.UserName = userName;
string password = Password;
s.Connect(new IPEndPoint(IPAddress.Parse(host_ip), port)); //22 is the default SSH port
//former algorithm is given priority in the algorithm negotiation
f.PreferableHostKeyAlgorithms = new PublicKeyAlgorithm[] { PublicKeyAlgorithm.RSA, PublicKeyAlgorithm.DSA };
f.PreferableCipherAlgorithms = new Granados.CipherAlgorithm[] { Granados.CipherAlgorithm.Blowfish, Granados.CipherAlgorithm.TripleDES };
f.WindowSize = 0x1000; //this option is ignored with SSH1
reader = new Reader(); //simple event receiver
reader.parentObj = this;
Granados.AuthenticationType at = Granados.AuthenticationType.Password;
f.AuthenticationType = at;
if (at == Granados.AuthenticationType.KeyboardInteractive)
{
//Creating a new SSH connection over the underlying socket
_conn = Granados.SSHConnection.Connect(f, reader, s);
reader._conn = _conn;
Debug.Assert(_conn.AuthenticationResult == Granados.AuthenticationResult.Prompt);
Granados.AuthenticationResult r = ((SSH2Connection)_conn).DoKeyboardInteractiveAuth(new string[] { password });
Debug.Assert(r == Granados.AuthenticationResult.Success);
}
else
{
//NOTE: if you use public-key authentication, follow this sample instead of the line above:
//f.AuthenticationType = AuthenticationType.PublicKey;
f.IdentityFile = AppDomain.CurrentDomain.BaseDirectory + "Key-File.key";
f.Password = password;
f.KeyCheck = delegate(Granados.SSHConnectionInfo info)
{
byte[] h = info.HostKeyMD5FingerPrint();
foreach (byte b in h)
{
Debug.Write(String.Format("{0:x2} ", b));
}
return(true);
};
//Creating a new SSH connection over the underlying socket
_conn = Granados.SSHConnection.Connect(f, reader, s);
reader._conn = _conn;
ConnectionStatus = 1; //TerminalSSH.ConnectionStatus = 1;
}
//Opening a shell
Granados.SSHChannel ch = _conn.OpenShell(reader);
reader._pf = ch;
//you can get the detailed connection information in this way:
//Granados.SSHConnectionInfo ci = _conn.ConnectionInfo;
//Go to sample shell
//SampleShell(reader);
return(true);
}
/// <summary>
/// Test cursor movements
/// </summary>
/// <param name="vs">Virtual screen</param>
public static void WriteBigX(VirtualScreen vs)
{
vs.CleanScreen();
for (int i=0; i<vs.Height; i++)
{
vs.Write('X'); // already moves cursor about one
vs.MoveCursor(vs.Width); // test overflow
}
vs.Write('\r'); // beginning of last line
for (int i=0; i<vs.Height; i++)
{
vs.Write('X'); // already moves cursor about one
vs.MoveCursor(-vs.Width); // test overflow
}
}
/// <summary>
/// Write a byte block and strings
/// </summary>
/// <param name="vs">Virtual screen</param>
public static void WriteBlockOperation(VirtualScreen vs)
{
vs.CleanScreen();
byte[] tb = Encoding.ASCII.GetBytes("This is a test output");
vs.WriteLine("New screen with test output:");
for (int i=0; i<10; i++)
{
vs.WriteByte(tb);
}
vs.WriteLine("\n");
for (int i=0; i<10; i++)
{
vs.WriteLine("Line output");
}
}
